Antiskid device



sept. 19, 1933. F* CIRMAN 1,927,779

ANTISKID DEVICE Filed Jan. l5, 1932 INVENTOR iA/VK C/RMA/v r/r TTO EY Patented Sept. 19,k 1933 ,l i

Application January 15, 1932. SeriaINo. 586,741

1 Claim.. (c1. isz-+14) t This invention relates to anti-skid devices for automobile tires and wheels and has for its object to provide an improved device of this kind which can be easily and quickly applied to thek tire and wheel.

A further object of this inventionis to provide the anti-skid device with an improved traction element for use on icy or otherwise slippery roads. l

This and other objects of the invention` will become more readily apparent from the detailed description of the invention which follows, reference being had to the accompanying drawing inl which Figure 1 is a side elevation of the l anti-skid device.

Figure 2 is an end elevation of the anti-skiddevice as it appears when applied to the tire-and Wheel, the portion of the tire and the wheel' to which the device is attached being illustrated in section. Y

Figure 3 is a detail top plan view of the traction element of the anti-skid device.

Figure 4 isa detailed view of the ends of the clamp member and the clamp lever asfthey appear when they are disengaged;

In the several gures of the drawinglike reference numerals indicate like parts.

The anti-skid device forming the subject matter of my invention comprises the clamp member 1 which includes the clamp lever 2 with which the traction member 3 is held in place over the tread of the tire 4. The traction member 3 comprises a heavy metal plate having a curved bottom'which is adapted to nt over the curved surface of the tread of the tire. The top of the traction member is provided with three sets of elongated teeth 5, 6 and 7, of which teeth 6, 6 are located in the middle and'extend at right angles to the perimeter of the tire, While teeth 5, 5 and '7, '7 are located on each side of teeth 6, 6 respectively and are parallel to each other and to the perimeter of the tire to which the traction member is attached.

The traction member 3 has a pair of eyes Sand 9 provided thereon, one at each side thereof and these eyes are connected by the chains 10 and 11 to the links 12 and 13 respectively. Link 12 in lug on the clamping lever and these two shoulders i allow the lever to be rocked on the clamp member while the lug 15 remains in engagement/with the'clamp member and prevents the disengage- A. ment of the lever from the clamp member.

v The clamplever 2v may thus be swung from its full line or locking pcisition,` illustrated in ligure-:vv

22 to the left thereof as `indicated in thel dotted lines. The locking lever is thus gradually swung away from the clamping member and releases its tension on the chainfll and tread memberv 3 until the lever is nally placed inl such a position in .which the 1ug'15A thereof may ybe pulled outoi engagement with the hole 16 in the clamp member 1. 'Ihe locking lever is thus completely disengaged from the clamp member which is then free to drop away from the rim of the Wheel to release the chains 11 and 12 with the tread member 3 v f A between them so that the anti-skid device may be completely removed from the wheel and tire. A reversal of this operation will place the anti-skid' device backfonto the tire and Wheel. 1 In its locked position thelocking lever is held in place between two spring ngers 18 rand 19 which form part of'an inverted U-'shapedvspring 80 bracket which .is suitably fastenedto the clamp member in the position illustrated in Figures 1, and 2. ,Y

, The tread member y3` may be attached to antiskid chains in place'of the cross` links. 85' Iclaimz vA tread member for an anti-skid device rcomprising a plate, parallel elongated teeth extending partway across said plate intermediate thereof, said teeth being inclined in one direction on one '90 side thereof and being vertical on the opposite side thereof, parallel elongated teeth extending at right angles to said rst mentioned teeth and being of reduced height thereto, said secondy mentioned teeth being locatedv at each end of said rst mentioned teeth and being Vinclined out-v wardlytherefrom with a, straight vertical side provided on the outside of each tooth.` j

- FRANK CIRMAN.

turn is pivoted to the outer end of the clamp Y member 1, while link 13 is pivoted in the eye 14 provided on the under side of the clamp lever 2.

The clamp lever 2 is hinged to the clamp member by means of the lug 15 which is in engagement with the opening 16 provided near the end of the clamp member. The lug 15 is reduced in width so that a shoulder 17 is formed on each side of the v 

